<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width:150px;
            height:150px;
            background-color:pink;
        }
    </style>
</head>
<body>
<div class="div1"></div>
<script src="js/sea.js" data-main="main.js"></script>
<script src="js/main.js"></script>
</body>
</html>